If its in reasonably good shape, no broken or damaged parts, and it doesn't "look worn", with everything working, could be around $300.00 more or less. Check ebay for V1 prices, they come up fairly often. It won't be hard to sell, its fairly popular, even as a early version.
Helis are somewhat difficult to sell for what you might think they are worth...they wear out faster or get more easily damaged than a plane, lots of potential abuse, so prices on ebay tend to be what I'd consider on the low side, due to the pig-in-a-poke factor. A face to face meeting, such as at a swap meet, may go better cause the buyer can inspect it first.
"First impressions" make a big difference, IMHO. That means a CLEAN heli. The canopy should be neary pristine, no cracks, peeling decals, flaked or chipping paint. Grease at a minimum. Clean the dust and dirt out of the nooks and crannies. Replace stained fuel tanks.
oops...got carried away here! Not what you were asking. :)
John